3 Replies Latest reply: Feb 4, 2009 10:19 PM by Peter Lin
Christopher Marsden Level 1 Level 1
I got a MacBookAir, just coming up to 1 year old - so warranty going to expire soon.

I've noticed in the last couple of months that the battery rarely if ever fully charges to 100 % Usually it shows 98% as a full charge, even if it's been charging overnight.

So, is the battery beginning to deteriorate, is the question I am asking ? If so, then I reckon that it still being under warranty, I might be able to get a replacement on account of when I spend so much money on a laptop I expect it to keep working in perfect condition at least for a year. Call me old fashioned, but I do expect value for my money ! And a battery that works properly after moderate use for not even a year is not too much of an expectation to have, I think.

So, is the failure to charge to 100% indicative of a deterioration in the battery ?

Thoughts, please !


Intel iMac 24 inch (size matters...!) & MacBookAir, Mac OS X (10.5.2), ...iPhone ....Time Capsule
  • Carl Mignacca Level 1 Level 1
    Hey, How are you?
    I have 2 things to tell you.

    1. Please do yourself a favor and buy Apple Care. if you buy it on Ebay, It is cheaper and it is still legit!
    2. RE: Your problem with the battery. I have had this happen So many times to my new Macbook Pro! All you have to do is take the charger out, and use your computer until the battery drains and it puts it self to Sleep! After this you should see your problem fading away. Just as a side note, You should do that Once of Twice a week!
    Enjoy your baby!
  • stedman1 Level 9 Level 9
    Hi Chris: Perfectly normal. See the Apple article below for more info:


  • Peter Lin Level 2 Level 2
    My interpretation of the KB article is that it's normal for the battery to stop charging to avoid a short discharge/charge cycle, so if you use the computer for a short time on battery and then attach the charger, it might not charge to 100%.

    However, I don't think it's normal for the battery to not charge up to 100% if you attach the charger after using the computer for longer and draining the battery beyond 93%.

    Today, my battery was at about 75-80% when I attached the charger, and I've been stuck at 99% (Calculating...) for about 6 hours now, and the LED light on my MagSafe plug is still orange. I don't think that's normal.